Path Traversal in Pypa Pip
CVE-2026-13346
pip would incorrectly handle doubly-encoded package URLs from indexes allowing for files to be installed to arbitrary locations on disk even when installing wheels. This vulnerability requires downloading or installing a package from a malicious package index to succeed, malicious packages alone are not able to exploit this vulnerability. Note that this vulnerability only materially impacts users running `pip download` with the `--only-binary` option as installing source distributions from an untrusted index is already an unsafe operation that executes code during install time.
EPSS: 0.003 (21.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N.
Affected products
- Pypa Pip
- Python Packaging Authority Pip — versions 0
Weakness classification (CWE)
References
- cna@python.org (Patch, patch, Issue Tracking)
- cna@python.org (vendor-advisory, Mailing List, Third Party Advisory)
- af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2026-13346?
- CVE-2026-13346 is a medium-severity vulnerability in Pypa Pip, classified under Absolute Path Traversal. CVSS score: 6.5/10. Published 2026-07-29.
- How severe is CVE-2026-13346?
- Medium severity. CVSS v3 base score is 6.5 out of 10.